#!/bin/bash
#
# vdsm-restore-net-config: restore network configuration files to their
# declared-safe state.
#
# this should NOT be used in ovirt, where configuration persistence is handled
# otherwise.

rpm -q --qf '' ovirt-node > /dev/null && exit 0

NET_CONF_DIR='/etc/sysconfig/network-scripts/'
NET_CONF_BACK_DIR=${NET_CONF_DIR}.vdsmback
DELETE_HEADER='# original file did not exist'

for f in "$NET_CONF_BACK_DIR"/*;
do
    [ ! -f "$f" ] && continue
    f=`basename "$f"`
    declare -a todel tomove
    if grep -q "$DELETE_HEADER" "$NET_CONF_BACK_DIR/$f"
    then
        todel[${#todel[@]}]="$f"
    else
        tomove[${#tomove[@]}]="$f"
    fi
    should_restart=yes
done

if [ "$should_restart" == yes ];
then
    service network stop
    # ifdown'ed bridge are not deleteted
    for f in "${todel[@]}";
    do
        grep -q '^TYPE=Bridge' "$NET_CONF_DIR/$f" && brctl delbr "${f/ifcfg-/}"
    done
fi

for f in "${todel[@]}";
do
    rm -f "$NET_CONF_DIR/$f"
    rm "$NET_CONF_BACK_DIR/$f"
done
for f in "${tomove[@]}";
do
    mv "$NET_CONF_BACK_DIR/$f" "$NET_CONF_DIR"
done
[ -d "$NET_CONF_BACK_DIR" ] && rmdir "$NET_CONF_BACK_DIR"
[ "$should_restart" == yes ] && service network start
